Beginner problem.

[Mark McEahern]

[DelPiccolo Ivano]
> How can i know if i have parameters in the command line.
> 
> Here's my script, where is the error ?
> 
> import sys
> 
> if sys.argv[??????] == "" :
>     print "Usage : sys.argv[0] logname string_to_search"
> else :
>    ...........
>     ..........
>     ..........

This tells you how many arguments you have:

	len(sys.argv)

Here's a sample that should get you started:

    #! /usr/bin/env python
    # junk.py

    import sys

    path = sys.argv[0]

    if len(sys.argv) == 1:
        print "No arguments were specified for %s." % path
    else:
        for arg in sys.argv:
            print arg

Running it...

  $ junk.py
  No arguments were specified for ./junk.py.
  $ junk.py foo bar
  ./junk.py
  foo
  bar

Cheers,

// mark